Laars Heating Systems E2074502 Pressure Switch
The Laars Heating Systems E2074502 Pressure Switch is an essential safety component engineered for precise airflow monitoring in Laars residential boilers and heating units. This technical-grade air pressure switch is factory-calibrated to a set point of 0.4" WC (water column), providing reliable verification of inducer motor performance. Featuring a Single Pole Single Throw (SPST) configuration and standard 1/4" barb connections, this part ensures the combustion blower is generating sufficient negative pressure before the ignition sequence begins. Designed for high-reliability applications, the E2074502 is commonly utilized in Laars Mini-Therm JVi models and JVH series boilers (sizes 125-160). As a 0.4 inch WC pressure switch, it functions by closing the electrical circuit to the control board only when the exact pneumatic threshold is met, effectively preventing dangerous backdrafting or incomplete combustion scenarios. This OEM Laars replacement part is rated for installations from 0-5000 ft altitude, making it a versatile choice for standard hydronic heating system repair and maintenance.
Key Benefits for Contractors:- Precise 0.4" WC Activation: Ensures accurate "proof of air" for high-efficiency Laars boiler systems, preventing nuisance lockouts.
- Standardized 1/4" Barb: Features standard vacuum hose ports for quick integration with existing HVAC pressure tubing.
- Optimized for JVH Series: Direct fit for Laars Heating Systems E2074502 requirements in Mini-Therm JVi 125-160 models.
- Industrial Build Quality: Durable diaphragm construction withstands the thermal cycling common in residential hydronic heating environments.
- High Altitude Compatibility: Rated for performance at elevations ranging from sea level up to 5,000 feet.
- What are the symptoms of a failing Laars E2074502? Most technicians report the inducer motor running continuously without the burners igniting, often accompanied by a "pressure switch stuck open" error code on the control board.
- Can this switch be used for higher altitudes? This specific model is calibrated for 0-5000 ft. For installations above 5,000 feet, consult the manufacturer for high-altitude specific pressure switches to ensure safety.
- How do I test the SPST circuit? Use a digital multimeter set to Ohms; with the inducer running and hoses connected, the switch should show near-zero resistance (continuity). If it stays open at 0.4" WC, the switch or tubing may be compromised.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
Original: $53.77
-65%$53.77
$18.82Laars Heating Systems E2074502 Pressure Switch
The Laars Heating Systems E2074502 Pressure Switch is an essential safety component engineered for precise airflow monitoring in Laars residential boilers and heating units. This technical-grade air pressure switch is factory-calibrated to a set point of 0.4" WC (water column), providing reliable verification of inducer motor performance. Featuring a Single Pole Single Throw (SPST) configuration and standard 1/4" barb connections, this part ensures the combustion blower is generating sufficient negative pressure before the ignition sequence begins. Designed for high-reliability applications, the E2074502 is commonly utilized in Laars Mini-Therm JVi models and JVH series boilers (sizes 125-160). As a 0.4 inch WC pressure switch, it functions by closing the electrical circuit to the control board only when the exact pneumatic threshold is met, effectively preventing dangerous backdrafting or incomplete combustion scenarios. This OEM Laars replacement part is rated for installations from 0-5000 ft altitude, making it a versatile choice for standard hydronic heating system repair and maintenance.
Key Benefits for Contractors:- Precise 0.4" WC Activation: Ensures accurate "proof of air" for high-efficiency Laars boiler systems, preventing nuisance lockouts.
- Standardized 1/4" Barb: Features standard vacuum hose ports for quick integration with existing HVAC pressure tubing.
- Optimized for JVH Series: Direct fit for Laars Heating Systems E2074502 requirements in Mini-Therm JVi 125-160 models.
- Industrial Build Quality: Durable diaphragm construction withstands the thermal cycling common in residential hydronic heating environments.
- High Altitude Compatibility: Rated for performance at elevations ranging from sea level up to 5,000 feet.
- What are the symptoms of a failing Laars E2074502? Most technicians report the inducer motor running continuously without the burners igniting, often accompanied by a "pressure switch stuck open" error code on the control board.
- Can this switch be used for higher altitudes? This specific model is calibrated for 0-5000 ft. For installations above 5,000 feet, consult the manufacturer for high-altitude specific pressure switches to ensure safety.
- How do I test the SPST circuit? Use a digital multimeter set to Ohms; with the inducer running and hoses connected, the switch should show near-zero resistance (continuity). If it stays open at 0.4" WC, the switch or tubing may be compromised.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Description
The Laars Heating Systems E2074502 Pressure Switch is an essential safety component engineered for precise airflow monitoring in Laars residential boilers and heating units. This technical-grade air pressure switch is factory-calibrated to a set point of 0.4" WC (water column), providing reliable verification of inducer motor performance. Featuring a Single Pole Single Throw (SPST) configuration and standard 1/4" barb connections, this part ensures the combustion blower is generating sufficient negative pressure before the ignition sequence begins. Designed for high-reliability applications, the E2074502 is commonly utilized in Laars Mini-Therm JVi models and JVH series boilers (sizes 125-160). As a 0.4 inch WC pressure switch, it functions by closing the electrical circuit to the control board only when the exact pneumatic threshold is met, effectively preventing dangerous backdrafting or incomplete combustion scenarios. This OEM Laars replacement part is rated for installations from 0-5000 ft altitude, making it a versatile choice for standard hydronic heating system repair and maintenance.
Key Benefits for Contractors:- Precise 0.4" WC Activation: Ensures accurate "proof of air" for high-efficiency Laars boiler systems, preventing nuisance lockouts.
- Standardized 1/4" Barb: Features standard vacuum hose ports for quick integration with existing HVAC pressure tubing.
- Optimized for JVH Series: Direct fit for Laars Heating Systems E2074502 requirements in Mini-Therm JVi 125-160 models.
- Industrial Build Quality: Durable diaphragm construction withstands the thermal cycling common in residential hydronic heating environments.
- High Altitude Compatibility: Rated for performance at elevations ranging from sea level up to 5,000 feet.
- What are the symptoms of a failing Laars E2074502? Most technicians report the inducer motor running continuously without the burners igniting, often accompanied by a "pressure switch stuck open" error code on the control board.
- Can this switch be used for higher altitudes? This specific model is calibrated for 0-5000 ft. For installations above 5,000 feet, consult the manufacturer for high-altitude specific pressure switches to ensure safety.
- How do I test the SPST circuit? Use a digital multimeter set to Ohms; with the inducer running and hoses connected, the switch should show near-zero resistance (continuity). If it stays open at 0.4" WC, the switch or tubing may be compromised.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
